Improved download database management

constants.py

@@ -14,14 +14,18 @@ class ChecksumWhat(Enum):
     DB = auto()
 
 class Messages(object):
-    NO_DB_AVAIL       = "No database available.\nGo to Updates->Update database."
+    DB_UP_TO_DATE            = "Already up to date"
+    DB_UP_TO_DATE_MSG        = "No newer version to download."
+    DB_NEW_VER               = "New version available"
+    DB_NEW_VER_MSG           = "A new version of the database is available for download."
+    NO_DB_AVAIL              = "No database detected."
     NO_DB                    = "No database"
+    DOWNLOAD_NOW_QUESTION    = "Do you want to download it now?"
+    DOWNLOAD_ANYWAY_QUESTION = "Do you want to download it anyway?"
     NO_CONNECTION            = "No internet connection"
     NO_CONNECTION_MSG        = "Unable to establish an internet connection."
     BAD_DOWNLOAD             = "Something went wrong"
     BAD_DOWNLOAD_MSG         = "Something went wrong with the downaload.\nCheck your internet connection and try again."
-    BAD_FILE          = "Bad file detected"
-    BAD_FILE_MSG      = "The downloaded file seems to be corrupted.\nThe old database has not been deleted and\nthe downloaded file has been discarded."
 
 class Signal(object):
     NAME          = "name"

download_window.py

@@ -28,11 +28,6 @@ class DownloadWindow(QWidget, Ui_Download_window):
                                                      text = Messages.BAD_DOWNLOAD_MSG,
                                                      connection = self.close)
 
-        # Never used (should exploit the checksum check for the single file)
-        self.bad_file_msg = throwable_message(self, title = Messages.BAD_FILE,
-                                              text = Messages.BAD_FILE_MSG,
-                                              connection = self.close)
-
         self.download_thread = DownloadThread()
         self.download_thread.finished.connect(self.wait_close)
 
@@ -46,10 +41,6 @@ class DownloadWindow(QWidget, Ui_Download_window):
         self.bad_db_download_msg.show()
         self.everything_ok = False
 
-    def show_bad_file_warning(self):
-        self.bad_file_msg.show()
-        self.everything_ok = False
-
     @pyqtSlot()
     def terminate_process(self):
         if self.download_thread.isRunning():

main.py

@@ -12,6 +12,7 @@ from PyQt5.QtWidgets import (QMainWindow,
                              qApp,
                              QDesktopWidget,
                              QListWidgetItem,
+                             QMessageBox,
                              QSplashScreen,
                              QTreeView,
                              QTreeWidgetItem,)
@@ -29,7 +30,8 @@ from download_window import DownloadWindow
 import constants
 from themes import Theme
 
-from utilities import (uncheck_and_emit, 
+from utilities import (checksum_ok,
+                       uncheck_and_emit, 
                        throwable_message,
                        connect_to,
                        filters_ok,
@@ -49,7 +51,8 @@ class MyApp(QMainWindow, Ui_MainWindow):
         self.set_initial_size()
         self.download_window = DownloadWindow()
         self.actionExit.triggered.connect(qApp.quit)
-        self.action_update_database.triggered.connect(self.download_db)
+        self.action_update_database.triggered.connect(self.ask_if_download)
+        self.action_check_db_ver.triggered.connect(self.check_db_ver)
         self.db = None
         self.current_signal_name = ''
         self.signal_names = []
@@ -334,14 +337,13 @@ class MyApp(QMainWindow, Ui_MainWindow):
 
 # ##########################################################################################
 
-        self.load_db()
+        # self.load_db()
 
         # Left list widget and search bar.
         self.search_bar.textChanged.connect(self.display_signals)
-        self.result_list.addItems(self.signal_names)
         self.result_list.currentItemChanged.connect(self.display_specs)
         self.result_list.itemDoubleClicked.connect(lambda: self.main_tab.setCurrentWidget(self.signal_properties_tab))
-        self.display_signals()
+        # self.display_signals()
         self.audio_widget = AudioPlayer(self.play, 
                                         self.pause, 
                                         self.stop, 
@@ -365,8 +367,10 @@ class MyApp(QMainWindow, Ui_MainWindow):
             BandLabel(self.ehf_left, self.ehf, self.ehf_right),
         ]
 
+# Final operations.
         self.theme.initialize()
-
+        self.load_db()
+        self.display_signals()
         self.show()
 
     @pyqtSlot()
@@ -456,6 +460,9 @@ class MyApp(QMainWindow, Ui_MainWindow):
             self.lower_band_confidence.setFixedWidth(120)
             self.upper_band_confidence.setFixedWidth(120)
 
+            self.freq_gfd.setFixedWidth(200)
+            self.unit_freq_gfd.setFixedWidth(120)
+
             self.audio_progress.setFixedHeight(20)
             self.volume.setStyleSheet("""
                 QSlider::groove:horizontal {
@@ -475,10 +482,58 @@ class MyApp(QMainWindow, Ui_MainWindow):
 
     @pyqtSlot()
     def download_db(self):
+        if not self.download_window.isVisible():
             self.download_window.download_thread.finished.connect(self.show_downloaded_signals)
             self.download_window.download_thread.start()
             self.download_window.show()
         
+    @pyqtSlot()
+    def ask_if_download(self):
+        if not self.download_window.isVisible():
+            db_path = os.path.join(constants.DATA_FOLDER, constants.Database.NAME)
+            try:
+                with open(db_path, "rb") as file_db:
+                    db = file_db.read()
+            except:
+                self.download_db()
+            else:
+                if not checksum_ok(db, constants.ChecksumWhat.DB):
+                    self.download_db()
+                else:
+                    answer = throwable_message(self, title = constants.Messages.DB_UP_TO_DATE,
+                                               text = constants.Messages.DB_UP_TO_DATE_MSG,
+                                               informative_text = constants.Messages.DOWNLOAD_ANYWAY_QUESTION,
+                                               is_question = True,
+                                               default_btn = QMessageBox.No).exec()
+                    if answer == QMessageBox.Yes:
+                        self.download_db()
+
+    @pyqtSlot()
+    def check_db_ver(self):
+        if not self.download_window.isVisible():
+            db_path = os.path.join(constants.DATA_FOLDER, constants.Database.NAME)
+            answer = None
+            try:
+                with open(db_path, "rb") as file_db:
+                    db = file_db.read()
+            except:
+                answer = throwable_message(self, title = constants.Messages.NO_DB, 
+                                           text = constants.Messages.NO_DB_AVAIL,
+                                           informative_text = constants.Messages.DOWNLOAD_NOW_QUESTION,
+                                           is_question = True).exec()
+            else:
+                if checksum_ok(db, constants.ChecksumWhat.DB):
+                    throwable_message(self, title = constants.Messages.DB_UP_TO_DATE, 
+                                      text = constants.Messages.DB_UP_TO_DATE_MSG).show()
+                                            
+                else:
+                    answer = throwable_message(self, title = constants.Messages.DB_NEW_VER,
+                                               text = constants.Messages.DB_NEW_VER_MSG,
+                                               informative_text = constants.Messages.DOWNLOAD_NOW_QUESTION,
+                                               is_question = True).exec()
+            if answer == QMessageBox.Yes:
+                self.download_db()
+
     @pyqtSlot()
     def show_downloaded_signals(self):
         if self.download_window.everything_ok:
@@ -497,14 +552,19 @@ class MyApp(QMainWindow, Ui_MainWindow):
                                names = names,)
         except FileNotFoundError:
             self.search_bar.setDisabled(True)
-            throwable_message(self, title = constants.Messages.NO_DB, 
+            answer = throwable_message(self, title = constants.Messages.NO_DB, 
-                              text = constants.Messages.NO_DB_AVAIL).show()
+                                       text = constants.Messages.NO_DB_AVAIL,
+                                       informative_text = constants.Messages.DOWNLOAD_NOW_QUESTION,
+                                       is_question = True).exec()
+            if answer == QMessageBox.Yes:
+                self.download_db()
         else:
             self.signal_names = self.db.index
             self.total_signals = len(self.signal_names)
             self.db.fillna(constants.UNKNOWN, inplace = True)
             self.db[constants.Signal.WIKI_CLICKED] = False
             self.update_status_tip(self.total_signals)
+            self.result_list.addItems(self.signal_names)
 
     @pyqtSlot()
     def set_min_value_upper_limit(self, lower_combo_box, 
@@ -621,6 +681,8 @@ class MyApp(QMainWindow, Ui_MainWindow):
                 available_signals += 1
             else:
                 self.result_list.item(index).setHidden(True)
+        # Remove selected item.
+        self.result_list.selectionModel().clear()
         self.update_status_tip(available_signals)
 
     def update_status_tip(self, available_signals):
@@ -959,12 +1021,12 @@ class MyApp(QMainWindow, Ui_MainWindow):
 
 if __name__ == '__main__':
     my_app = QApplication(sys.argv)
-    img = QPixmap("splash.jpg")
+    # img = QPixmap("splash.jpg")
-    img = img.scaled(600, 600, aspectRatioMode = Qt.KeepAspectRatio)
+    # img = img.scaled(600, 600, aspectRatioMode = Qt.KeepAspectRatio)
-    splash = QSplashScreen(img)
+    # splash = QSplashScreen(img)
-    splash.show()
+    # splash.show()
-    splash.showMessage("Loading database...")
+    # splash.showMessage("Loading database...")
-    sleep(2)
+    # sleep(2)
     w = MyApp()
-    splash.finish(w)
+    # splash.finish(w)
     sys.exit(my_app.exec_())

main_window.ui

@@ -178,7 +178,7 @@
         <enum>QTabWidget::Rounded</enum>
        </property>
        <property name="currentIndex">
-        <number>2</number>
+        <number>0</number>
        </property>
        <property name="movable">
         <bool>true</bool>
@@ -1775,7 +1775,7 @@ p, li { white-space: pre-wrap; }
             <string notr="true"/>
            </property>
            <property name="currentIndex">
-            <number>4</number>
+            <number>0</number>
            </property>
            <property name="movable">
             <bool>true</bool>
@@ -4869,6 +4869,7 @@ QSlider::handle:horizontal {
     <property name="title">
      <string>Updates</string>
     </property>
+    <addaction name="action_check_db_ver"/>
     <addaction name="action_update_database"/>
    </widget>
    <widget class="QMenu" name="menu_themes">
@@ -4895,6 +4896,11 @@ QSlider::handle:horizontal {
     <string>Update database</string>
    </property>
   </action>
+  <action name="action_check_db_ver">
+   <property name="text">
+    <string>Check latest database version</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>

themes/3-material_design/colors.txt

@@ -1,2 +0,0 @@
-active=#ddffdf
-inactive=#949494

themes/3-material_design/material_design.qss

@@ -1,410 +0,0 @@
-/*****************************************************************************
-MainWindow
-*****************************************************************************/
-QWidget:window {
-	border: 0px solid #2e2f34;
-	background-color: #2e2f34;
-}
-
-/*****************************************************************************
-Search bar
-*****************************************************************************/
-QLineEdit {
-	background-color: transparent;
-	border: 0px solid transparent;
-	border-bottom: 2px solid #669900;
-	color:  #669900;
-}
-
-/*****************************************************************************
-Scroll Bars
-*****************************************************************************/
-QScrollBar:horizontal {
-	background: transparent;			/* Background where slider is not */
-	height: 10px;
-	margin: 0;
-}
-
-QScrollBar:vertical {
-	background: transparent;			/* Background where slider is not */
-	width: 10px;
-	margin: 0;
-}
-
-QScrollBar::handle:horizontal {
-    background: #37474F;					/* Slider color */
-    min-width: 16px;
-	border-radius: 5px;
-}
-
-QScrollBar::handle:vertical {
-    background: #37474F;					/* Slider color */
-    min-height: 16px;
-	border-radius: 5px;
-}
-
-QScrollBar::add-page:horizontal, QScrollBar::sub-page:horizontal,
-QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical {
-	background: none;												/* Removes the dotted background */
-}
-
-QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal,
-QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {	/* Hides the slider arrows */
-      border: none;
-      background: none;
-}
-
-/*****************************************************************************
-List
-*****************************************************************************/
-QListWidget {
-	background-color: transparent;
-	border: 0px solid transparent;
-	border-bottom: 2px solid #80CBC4;
-	color: #c2cfd6;
-}
-
-QListView::item:hover {
-	color: #669900;
-	background: transparent;
-}
-
-QListView::item:selected {
-	color: #88cc00;
-	background: transparent;
-}
-
-QListView {
-	background-color: transparent;
-	color: #c2cfd6;
-	outline: 0;
-	border: 0px solid transparent;
-}
-
-/* === QTabBar === */
-QTabBar {
-	background: transparent;
-}
-
-QTabWidget::pane {
-	background: transparent;	/* Only at the very bottom of the tabs */
-}
-
-QTabBar::tab {
-	background: transparent;
-	border: 0px solid transparent;
-	border-bottom: 2px solid transparent;
-	color: #546E7A;
-	padding-left: 10px;
-	padding-right: 10px;
-	padding-top: 3px;
-	padding-bottom: 3px;
-}
-
-QTabBar::tab:hover {
-	background-color: transparent;
-	border: 0px solid transparent;
-	border-bottom: 2px solid #88cc00;
-	color: #AFBDC4;
-}
-
-QTabBar::tab:selected {
-	background-color: transparent;
-	border: 0px solid transparent;
-	border-top: none;
-	border-bottom: 2px solid #88cc00;
-	color: #FFFFFF;
-}
-
-QStackedWidget {
-	background: #2e2f34;/* This covers a bunch of things, I was thinking about making it transparent, */
-							/* but I would have to find all the other elements... but QTabWidget::pane may be it */
-}
-
-/* ==================== Dialog ==================== */
-QLabel {
-	background: transparent;
-	color: #CFD8DC;				/* Not sure about this one */
-}
-
-QDialog {
-	background-color: #263238;
-	color: #546E7A;
-	outline: 0;
-	border: 2px solid transparent;
-}
-
-/*****************************************************************************
-Buttons
-*****************************************************************************/
-
-QToolTip {
-	background-color: #80CBC4;
-	color: black;
-    padding: 5px;
-    border-radius: 0;
-    opacity: 200;
-}
-
-QPushButton {
-	background-color: transparent;
-	color: #c2cfd6;
-	border: 1px solid transparent;
-	padding: 4px 22px;
-}
-
-QPushButton:hover {
-	border-left: 2px solid #88cc00;
-    border-right: 2px solid #88cc00;
-	color: #f0f3f5;
-}
-
-QPushButton:pressed {
-	color: #efffcc;
-}
-
-QPushButton:disabled {
-	color:#546E7A;
-}
-
-QPushButton:checked {
-	color: #88cc00;
-}
-
-/*****************************************************************************
-Rich Text Box
-*****************************************************************************/
-QTextBrowser {
-	background: transparent;
-	border: 0px solid transparent;
-	color: #546E7A;
-}
-
-/*****************************************************************************
-Main Menu (Upper part)
-*****************************************************************************/
-QTreeView {
-	background-color: #263238;
-}
-
-QMenu {
-	background-color: #263238;		/* File Menu Background color */
-	color: #546E7A;
-}
-
-QMenu::item:selected {
-	color: #AFBDC4;
-}
-
-QMenu::item:pressed {
-	color: #FFFFFF;
-}
-
-QMenu::separator {
-	height: 1px;
-	background: transparent;			/* Could change this to #546E7A and reduce the margin top and bottom to 1px */
-	margin-left: 10px;
-	margin-right: 10px;
-	margin-top: 5px;
-	margin-bottom: 5px;
-}
-
-/*****************************************************************************
-Main Menu (Bar)
-*****************************************************************************/
-QMenuBar {
-	background-color: transparent;
-	color: #546E7A;
-}
-
-QMenuBar::item {
-	background: transparent;
-}
-
-QMenuBar::item:disabled {
-	color: gray;
-}
-
-QMenuBar::item:selected {
-	color: #AFBDC4;
-}
-
-QMenuBar::item:pressed {
-	color: #FFFFFF;
-}
-
-QToolBar {
-	background: transparent;
-	border: 1px solid transparent;
-}
-
-QToolBar:handle {
-	background: transparent;
-	border-left: 2px dotted #80CBC4;	/* Fix the 4 handle dots so it doesn't look crappy */
-	color: transparent;
-}
-
-QToolBar::separator {
-	border: 0;
-}
-
-/*****************************************************************************
-ComboBox
-*****************************************************************************/
-QComboBox {
-    border: 0px solid gray;
-    border-radius: 2px;
-    padding: 1px 6px 1px 6px;
-    min-width: 2em;
-}
-
-QComboBox:!editable, QComboBox::drop-down:editable {
-    color: #c2cfd6;
-    selection-color: #80CBC4;
-	background-color: transparent;
-	selection-background-color: transparent;
-}
-
-QComboBox:disabled {
-    color: #546E7A;
-}
-
-/* QComboBox gets the "on" state when the popup is open */
-QComboBox:!editable:on, 
-QComboBox::drop-down:editable:on {
-	color: #c2cfd6;
-	background-color: transparent;
-	selection-background-color: transparent;
-}
-
-QComboBox:on { /* shift the text when the popup opens */
-    padding-top: 3px;
-    padding-left: 4px;
-}
-
-QComboBox::drop-down {
-	background-color:  transparent;
-    subcontrol-origin: padding;
-    subcontrol-position: top right;
-    width: 20px;
-    border-top-right-radius: 2px; 
-    border-bottom-right-radius: 2px;
-}
-
-QComboBox::down-arrow:enabled {
-    image: url("./themes/3-material_design/icons/down-arrow.png");
-}
-
-QComboBox::down-arrow:disabled {
-    image: url("./themes/3-material_design/icons/down-arrow_off.png");
-}
-
-QComboBox::down-arrow:hover {
-    image: url("./themes/3-material_design/icons/down-arrow_hover.png");
-}
-
-QComboBox::down-arrow:on { /* shift the arrow when popup is open */
-    top: 1px;
-    left: 1px;
-}
-
-QComboBox QAbstractItemView {
-background-color: #2e2f34;
-}
-
-/*****************************************************************************
-RadioButton
-*****************************************************************************/
-
-QRadioButton{
-    color: #c2cfd6;
-}
-
-QRadioButton:disabled{
-    color: #546E7A;
-}
-
-QRadioButton::indicator{
-    width: 50px;
-    height: 50px;
-}
-
-QRadioButton::indicator::unchecked {
-    image: url("./themes/3-material_design/icons/off.png");
-}
-
-QRadioButton::indicator:unchecked:hover {
-    image: url("./themes/3-material_design/icons/off_press.png");
-}
-
-QRadioButton::indicator:unchecked:pressed {
-    image: url("./themes/3-material_design/icons/off_press.png");
-}
-
-QRadioButton::indicator::checked {
-    image: url("./themes/3-material_design/icons/on.png");
-}
-
-QRadioButton::indicator:checked:hover {
-    image: url("./themes/3-material_design/icons/on_press.png");
-}
-
-QRadioButton::indicator:checked:pressed {
-    image: url("./themes/3-material_design/icons/on_press.png");
-}
-
-/*****************************************************************************
-SpinBox
-*****************************************************************************/
-QSpinBox {
-    color: #c2cfd6;
-    border-width: 0px;
-    background: transparent;
-}
-
-QSpinBox:disabled {
-    color: #546E7A;
-    border-width: 0px;
-    background: transparent;
-}
-
-QSpinBox::up-button {
-    subcontrol-origin: border;
-    subcontrol-position: top right;
-    width: 16px;
-    image: url("./themes/3-material_design/icons/up-arrow.png");
-    border-width: 0px;
-}
-
-QSpinBox::up-button:hover {
-    image: url("./themes/3-material_design/icons/up-arrow_hover.png");
-}
-
-QSpinBox::up-button:pressed {
-    image: url("./themes/3-material_design/icons/up-arrow.png");
-}
-
-QSpinBox::up-button:disabled {
-    image: url("./themes/3-material_design/icons/up-arrow_off.png");
-}
-
-QSpinBox::down-button {
-    subcontrol-origin: border;
-    subcontrol-position: bottom right; /* position at bottom right corner */
-    width: 16px;
-    image: url("./themes/3-material_design/icons/down-arrow.png");
-    border-width: 0px;
-    border-top-width: 0;
-}
-
-QSpinBox::down-button:hover {
-    image: url("./themes/3-material_design/icons/down-arrow_hover.png");
-}
-
-QSpinBox::down-button:pressed {
-    image: url("./themes/3-material_design/icons/down-arrow.png");
-}
-
-QSpinBox::down-button:disabled {
-    image: url("./themes/3-material_design/icons/down-arrow_off.png");
-}

utilities.py

@@ -13,12 +13,22 @@ def uncheck_and_emit(button):
         button.setChecked(False)
         button.clicked.emit()
 
-def throwable_message(cls, title, text, connection = None):
+def throwable_message(cls, title, text, 
+                      informative_text = None, 
+                      connection = None, 
+                      is_question = False, 
+                      default_btn = QMessageBox.Yes):
     msg = QMessageBox(cls)
     msg.setWindowTitle(title)
     msg.setText(text)
+    if informative_text:
+        msg.setInformativeText(informative_text)
     if connection:
         msg.finished.connect(connection)
+    if is_question:
+        msg.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
+        msg.setDefaultButton(default_btn)
+    msg.adjustSize()
     return msg
 
 def checksum_ok(data, what):
@@ -26,7 +36,7 @@ def checksum_ok(data, what):
     code.update(data)
     if what == constants.ChecksumWhat.FOLDER:
         n = 0
-    elif what == constants.ChecksumWhat.DB: # This is for a runtime check of db version and suggest an update..
+    elif what == constants.ChecksumWhat.DB:
         n = 1
     else:
         raise ValueError("Wrong entry name.")